HP XP7 Storage - Manual (Page 11)

Performance Monitor data graphs
You can view both the short-range and long-range statistics on data graphs. All statistics can be
viewed in short range (for the storing period corresponding to the sampling interval setting). Usage
statistics about storage system resources, which are monitored in both ranges, can be viewed in
both short range and long range. When viewing usage statistics about resources, you can specify
the range to view and which part of the storing period to display on lists and graphics.
For details about the Performance Monitor data graphs, see “About the data graphs” (page 21) .
Export Tool for Performance Monitor
The Export Tool software that comes with Performance Monitor allows you to export the monitoring
data for analysis, for example using spreadsheet or database software. You can also use Export
Tool to save and accumulate data over extended periods of time for long-term analysis and future
reference.
For details about Export Tool, see “Exporting Performance Monitor data” (page 90) .
Cautions and restrictions for Performance Monitor
•
“Cautions and restrictions for monitoring” (page 11)
•
“Cautions and restrictions for usage statistics” (page 12)
Cautions and restrictions for monitoring
•
Performance monitoring switch
When the monitoring switch is set to disabled, short-range monitoring data is not collected.
•
Changing the SVP time setting
If the SVP time setting is changed while the monitoring switch is enabled, the following
monitoring errors can occur:
◦ Invalid monitoring data appears.
◦ No monitoring data is collected.
To change the SVP time setting, first disable the monitoring switch, change the SVP time setting,
and then re-enable the monitoring switch. After that, obtain the monitoring data. For details
about the monitoring switch, see
“Starting monitoring” (page 14) .
•
WWN monitoring
You must configure some settings before the traffic between host bus adapters and storage
system ports can be monitored. For details, see
“Adding new WWNs to monitor” (page 15) ,
“Adding WWNs to ports” (page 16) , and “Connecting WWNs to ports” (page 17) .
•
Parity group monitoring
To correctly display the performance statistics of a parity group, all volumes belonging to the
parity group must be specified as monitoring targets.
•
Storage system maintenance
If the storage system is undergoing the following maintenance operations during monitoring,
the monitoring data might contain extremely large values:
◦ Adding, replacing, or removing cache memory
◦ Adding, replacing, or removing data drives
◦ Changing the storage system configuration
Cautions and restrictions for Performance Monitor 11